Four bodies have been found in a wooded area in Brentwood, Long Island in a week, and police combed the area on Thursday looking for others.

Police—some armed with shovels—are searching the site of an abandoned hospital, Pilgrim State Hospital on Crooked Hill Road.

"We are scouring that area because we found two skeletal remains in that general area and we're going to do our due diligence," said Suffolk County Police Commissioner Timothy Sini, ABC7 New York reported.

First set of skeletal remains found Friday in Brentwood ID'ed as 19 year old Oscar Acosta, missing since April. pic.twitter.com/waSt3WK3nY

The remains discovered near Emjay Boulevard north of the Long Island Rail Road tracks has been identified as 19-year-old Oscar Acosta, who was missing since April 29,NBC4New York reported.

“The evidence indicates that he is a victim of violence, and we’re treating that as a homicide,” Sini said,CBS2New York reported.

The remains discovered on Wednesday have not yet been identified.

Nisa Mikens was killed last week on the eve of her 16th birthday near Ray Court in Brentwood. The body of her friend, 16-year-old Kayla Cuevas, was found in a wooded area 20 hours later. Both girls had been badly beaten.